When it comes to dry pressing , it has to be said that the dry pressing process is a method of forming metal powder and ceramic powder.
Therefore, the dry die is used in a very simple manner. It is only necessary to fill the dry powder blank into the cavity of the dry die, and then apply a certain pressure to make the dry powder blank into a dense blank.
In addition to the dry powder blank, a certain amount of surfactant, lubricant, binder, etc. are used in the use of the dry stamper.
Among them, the surfactant can be used to change the surface properties of the powder, thereby reducing the agglomeration effect of the ultrafine powder and making it evenly distributed.
After the addition of the lubricant, the friction between the particles and the surface of the particles and the dry stamper can be reduced; the purpose of adding the binder is to enhance the bond strength of the powder.
In addition, the blank is formed by a press or a special dry press, as well as a certain pressure and pressing method.
The performance of the obtained dry pressed blank is affected by many factors, in addition to the quality of the dry stamper.
It also relates to the properties of the powder, including particle size, particle size distribution, shape, moisture content, etc.; additive characteristics and use effects;
Pressure, pressurization, pressurization speed, etc. during pressing.
Compared with other molding methods, dry press molding not only has high production efficiency and low labor,
Moreover, the scrap rate is low, the production cycle is short, and the products produced are also characterized by high density and high strength, so this method is very suitable for mass industrial production.
However, at present, the cost of dry pressing die is relatively high, which also greatly limits the popularity of dry press forming technology. More applications are in the field of ceramic production, using dry pressing methods and dry pressing molds to manufacture ceramic tiles and wear-resistant porcelain. Lining ceramic sheets, sealing rings and other products.